<?php

/**
 * PHPTAL templating engine
 *
 * PHP Version 5
 *
 * @category HTML
 * @package  PHPTAL
 * @author   Laurent Bedubourg <lbedubourg@motion-twin.com>
 * @author   Kornel Lesiński <kornel@aardvarkmedia.co.uk>
 * @license  http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
 * @version  SVN: $Id$
 * @link     http://phptal.org/
 */

/**
 * @see PHPTAL_NamespaceAttribute
 * @package PHPTAL
 * @subpackage Namespace
 */
abstract class PHPTAL_Namespace {

  private $prefix, $namespace_uri;
  protected $_attributes;

  public function __construct($prefix, $namespace_uri) {
    if (!$namespace_uri || !$prefix) {
      throw new PHPTAL_ConfigurationException("Can't create namespace with empty prefix or namespace URI");
    }

    $this->_attributes = array();
    $this->prefix = $prefix;
    $this->namespace_uri = $namespace_uri;
  }

  public function getPrefix() {
    return $this->prefix;
  }

  public function getNamespaceURI() {
    return $this->namespace_uri;
  }

  public function hasAttribute($attributeName) {
    return array_key_exists(strtolower($attributeName), $this->_attributes);
  }

  public function getAttribute($attributeName) {
    return $this->_attributes[strtolower($attributeName)];
  }

  public function addAttribute(PHPTAL_NamespaceAttribute $attribute) {
    $attribute->setNamespace($this);
    $this->_attributes[strtolower($attribute->getLocalName())] = $attribute;
  }

  public function getAttributes() {
    return $this->_attributes;
  }

  abstract public function createAttributeHandler(PHPTAL_NamespaceAttribute $att, PHPTAL_Dom_Element $tag, $expression);
}
